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EPA/OAR RIN: 2060-AV09 Publication ID: Fall 2021 
Title: Amendments to the NSPS for GHG Emissions From New, Modified, Reconstructed Stationary Sources: EGUs 

On October 23, 2015, the EPA finalized Standards of Performance for Greenhouse Gas Emissions From New, Modified, and Reconstructed Stationary Sources: Electric Generating Units, found at 40 CFR Part 60, subpart TTTT. On December 20, 2018, the EPA proposed to revise the standards of performance in 40 CFR Part 60, subpart TTTT. The EPA proposed to amend the previous determination that the best system of emission reduction (BSER) for newly constructed coal-fired steam generating units (i.e., EGUs) is partial carbon capture and storage, and replace it with a determination that BSER for this source category is the most efficient demonstrated steam cycle (e.g., supercritical steam conditions for large units and subcritical steam conditions for small units) in combination with the best operating practices. The EPA is undertaking a comprehensive review of the NSPS for greenhouse gas emissions from EGUs, including a review of all aspects of the 2018 proposed amendments and requirements in the 2015 Rule that the Agency did not propose to amend in the 2018 proposal.

Agency: Environmental Protection Agency(EPA)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Undetermined  Unfunded Mandates: Undetermined 
CFR Citation: 40 CFR 60 TTTT   
Legal Authority: 42 U.S.C. 7411 Clean Air Act   
Legal Deadline:  None

Statement of Need: New EGUs are a significant source of GHG emissions. This action will evaluate options to reduce those emissions.

Summary of the Legal Basis: Clean Air Act section 111(b) provides the legal framework for establishing greenhouse gas emission standards for new electric generating units.

Alternatives: EPA evaluated several options for reducing GHG emissions from new EGUs

Anticipated Costs and Benefits: Undetermined.

Risks: Undetermined.

Action Date FR Cite
NPRM  06/00/2022 
Final Rule  06/00/2023 
Additional Information: .
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Undetermined 
Federalism: Undetermined 
Included in the Regulatory Plan: Yes 
International Impacts: This regulatory action will be likely to have international trade and investment effects, or otherwise be of international interest.
RIN Data Printed in the FR: No 
Related RINs: Related to 2060-AT56 
Agency Contact:
Christian Fellner
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code D243-01,
Research Triangle Park, NC 27711
Phone:919 541-4003
Fax:919 541-4991

Nick Hutson
Environmental Protection Agency
Office of Air and Radiation
109 T.W. Alexander Drive, Mail Code D243-01,
Research Triangle Park, NC 27711
Phone:919 541-2968
Fax:919 541-4991